prevent crash if 0 length vector is assessed

6 years ago · 9238c0f9d4
1 changed files with 4 additions and 1 deletions
--- a/src/spicelib/devices/vsrc/vsrcask.c
+++ b/src/spicelib/devices/vsrc/vsrcask.c
@ -92,7 +92,10 @@ VSRCask(CKTcircuit *ckt, GENinstance *inst, int which, IFvalue *value, IFvalue *
                strcpy(errMsg,msg);
                return(E_ASKCURRENT);
            } else {
-                value->rValue = *(ckt->CKTrhsOld+here->VSRCbranch);
+                if (ckt->CKTrhsOld)
+                    value->rValue = *(ckt->CKTrhsOld + here->VSRCbranch);
+                else
+                    value->rValue = 0.;
            }
            return(OK);
        case VSRC_POWER: